Cloudflare 5XX errors

When troubleshooting most 5XX errors, the correct course of action is to first contact your hosting provider or site administrator to troubleshoot and gather data. The following sections outline:

• The information to provide your hosting provider to help resolve the errors
• The steps to access error analytics in the Cloudflare dashboard.

Note

Cloudflare Support only assists the domain owner to resolve issues. If you are a site visitor, report the problem to the site owner.

Required error details for hosting provider

When contacting your hosting provider, share the following information:

• The specific 5XX error code and message.
• The time and timezone when the 5XX error occurred.
• The URL that resulted in the HTTP 5XX error (for example, https://www.example.com/images/icons/image1.png).

The cause of the error is not always found in the origin server's error logs. Be sure to check the logs of any load balancers, caches, proxies, or firewalls between Cloudflare and the origin web server.

Additional details to provide to your hosting provider or site administrator can be found in the error descriptions below. Note that Cloudflare Custom Errors can alter the appearance of default error pages discussed in this page.

Error analytics

Error analytics per domain are available within Zone Analytics. Error analytics provides insights into overall errors by HTTP error code and offers details such as the URLs, source IP addresses, and Cloudflare data centers needed to diagnose and resolve issues. Error Analytics are based on a 1% traffic sample.

To view Error Analytics:

1. Log in to the Cloudflare dashboard ↗.
2. Select your account and domain.
3. Go to Analytics & Logs.
4. Select Add filter, select Edge status code or Origin status code and choose any 5xx error code that you want to diagnose.

---

Error 500: internal server error

For a complete description of this error refer to the Error 500 page.

Error 502 bad gateway or error 504 gateway timeout

For a complete description of this error refer to the Error 502/504 page.

Error 503: service temporarily unavailable

For a complete description of this error refer to the Error 503 page.

Error 520: web server returns an unknown error

For a complete description of this error refer to the Error 520 page.

Error 521: web server is down

For a complete description of this error refer to the Error 521 page.

Error 522: connection timed out

For a complete description of this error refer to the Error 522 page.

Error 523: origin is unreachable

For a complete description of this error refer to the Error 523 page.

Error 524: a timeout occurred

For a complete description of this error refer to the Error 524 page.

Error 525: SSL handshake failed

For a complete description of this error refer to the Error 525 page.

Error 526: invalid SSL certificate

For a complete description of this error refer to the Error 526 page.

Error 530

For a complete description of this error refer to the Error 530 page.